Drawing apparatus in the bedplate of a press

Details Drawing apparatus in the bedplate of a press Drawing apparatus in the bedplate of a press

1992-04-14

1993-09-07

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72345, B21D 2408

Patent

active

052418499

ABSTRACT:
A drawing apparatus pressure pins acting upon the metal sheet holder in the bottom part of the tool are selected, has additional pressure cylinders fastened in the pressure cheek between the actual drawing apparatus acting upon a pressure cheek and the pressure pins. These additional pressure cylinders are individually controllable via valves from a pressure pipe. As a result, a precise influence is made on the drawing conditions of various sheet metal parts and their ejector movement from the bottom part of the tool.

REFERENCES:
patent: 1503131 (1924-07-01), Nelson
patent: 1970134 (1934-08-01), Ferris
patent: 2233164 (1941-02-01), Glasner
patent: 4601190 (1986-07-01), Schneider et al.
patent: 4745792 (1988-05-01), Story et al.

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